Refrigerating unit



July 23, 1935- M. P. FUGLE 2,009,312

REFRIGERATING UNIT Filed Nov. 1o, 193s 2 sheets-sheet 1 July 23, 1935.

REFRIGERATING UNI T Filed NOV. 10, 1933 2 Sheets-Sheet 2 M. P. FUGLE 2,009,312

Patented July 23, 1935 l UNITEDl .STATES PATENT OFFICE Commercial Coil and Refrigeration Co.,

Chi-

cago, Ill., a corporation of Illinois Application November 10, 1933, Serial No.'69'l,394

24 claims.A (c1. s2-101) The present invention relates to refrigerating apparatus and more particularly to what is known as coil boxes for cooling beverages such as beer or the like.

In refrigerating apparatus for dispensing beer, ice water, or the like, as heretofore constructed, it has been customary to provide a container for the reception of one or more coils, and to pack cracked ice in and about the coils in order to 10 secure reasonably satisfactory results in maintaining the beer at a low temperature.. Certain wellknown disadvantages are inherentin this form of refrigeration. Probably the greatest objection is the expense and inconvenience of pro- ,5 viding the cracked ice. On the other hand attendants dislike the handling of ice. In some instances, however, brine or refrigerant coils have been used to cool the beverage, but, unlike the cracked ice lying against the beverage coil, the e cooling medium employed would not transfer the heat from the beverage coils quickly enough, during a peak demand, to keep or hold the beverage at the desired low temperature. It seems that the cooling medium, whether water or air, will re- 25 tard a quick transfer of the heat and will tend to act as an insulator temporarily when an immediate demand for the beverage requires a prompt cooling thereof. To illustrate, it has been found that when the cooling medium would be say 34 30 to 35 Fahr., the drawing of several glasses of beverage would immediately raise the temperature of the cooling medium to say 40 Fahr., and the beverage to 45 Fahr. If additional beverage of any amount is then drawn from the coil, its 35 temperature continues rising to about that of the beverage entering the coil. In other words, the beverage would be drawn at a rate greater than the cooling rate of the cooling medium and the latter would be ineffective to maintain the bever- 40 age at a desired low temperature. There have been attempts to use a brine as a cooling medium so that a lower temperature might be maintained to hold the beverage at a low temperature. This has been unsatisfactory because any lower temperature of the brine will freeze thebeverage and the drinking water in their coils.

One of the principal objects of the present invention is the provision of a refrigerating apparatus for cooling beverages or the like in the form of a self-contained coil box comprising a beverage coil and automatically controlled refrigeration mechanism adapted, without attention, to maintain the beverage in the coil at a predetermined low temperature and to hold it at such low 5.-, temperature irrespective of the amount of beverage withdrawn. In the preferred form of the invention,` two compartments are provided, `one for the beverage coil and one for the refrigerant coil. The control mechanism functions to circulate the cooling medium from one compartment or chamber to the other, so that, as the beverage is withdrawn at the outlet of. the beverage coil,- the difference in temperature at the inlet thereof will start the control mechanism and circulate the cooling medium. -f

Another object of the invention is the provision of improved mechanism for maintaining the beverag'e and other liquids on draft, such as drinking water, at a predetermined low temperature, irrespective of the amount drawn(L without freezing such liquids in the coil pipes.

Another ob-jec't of the invention is the provision of refrigerating apparatus of the type-described wherein the cooling of the beverage and the maintenace thereof at a predetermined low temperature is controlled by thermal means responsive to temperature changes resulting from the withdrawal of the beverage at the outlet of the beverage coil.

A still further object of the invention,y is to accomplish the aforesaid results by the provision'of a motor driven circulating means adapted to circulate the cooling` medium, preferably from a compartment containing the refrigerant coil and into the compartment containing the. beverage coil or coils, whereby the warmer incoming beverage at the inlet of the beverage coil will set said circulating means into operation and establish a circulating of the cooling medium.

Still further objects and advantages of the present invention will be apparent from the following description when taken in connection with the accompanying drawings forming a part hereof.

In the drawings: 40

Figure 1 is a top elevation of a coil box embodying my invention;

Fig. 2 is a vertical sectional View of the coll box shown in Fig. 1;

A Fig. 3 illustrates a beverage cooling system em- 4'5 ploying the coil box disclosed herein;

Fig. 4 is a top elevational view-of a coil box employing a slightly modified container or tank construction;

Fig. 5 is a vertical sectional view thereof; 50 Fig. 6 is a detailed sectional view takenon line 6 6 of Fig. 5;

Fig. '7 is a fragmentary detailed view illustrating mounting the thermally responsive element within the inlet connection of the beer coil.

Referring in detail to the construction illustrated the coil box A has a suitable tank or container structure I provided with an outer top cover 2 and an inner partition 3 preferably made of any suitable heat insulation material dividing the same into compartmeits or chambers 4 and 5. A cooling coil 8 adapted to have a suitable re'- frigerant such as brine owing therethrough is disposed in compartment 4 with its inlet and outlet connections 1 and 8 leading to a compressor 9 or other suitable source of cooling means that may be employed. Beverage coils 9 and I0 are disposed in compartment 5. Inlet connections I I and I 2 of these beverage coils 9 and I8 lead to a barrel I 3 or other suitable source of beverage supply located with respect to the coil box at any convenient place in the building.

Usually installations dispensing beer have the barrels located in the basement with the compressor 26 conveniently located with respect thereto, the fluid connections leading to these parts through the oor I4. The particular manner of supplying the beverage to the coils 9 and I 0 in box A is not an important feature of the invention because various methods may be used and the same results accomplished.

The outlet connections I5 and age coils 9 and I0 may extend box and connect with spigots I1 cated on a counter I 8.

An inner cover I9 is provided for container I It of the beverthrough the coil conveniently lofor supporting certain parts of the coil box.V

Cover I 9 may be removably fastened by bolts 20 to the upper inner edge of container I, while the outer cover 2 provides an enclosure for the inner cover I9 by iitting over the upper end of container I.

Compartments 4 and 5 are provided with a suitable cooling medlum, such as water, which may be circulated from oney to the other compartment through upper and lower passages 2I and 22, these passages being illustrated at the upper and lower ends of partition 3, although they may be located anywhere along this partition as longr as an etllcient circulation of the cooling medium is obtained.

To effect this circulation of the cooling medium between the compartments 4 and 5, there` is provided a thermal responsive motor driven propeller 23 arranged at one end of a by-pass housing 24. The housing 24 is conveniently located with respect to the bottom of -,tank I and the passage 22 so that this passage 22 is in eifect the passage extending through the housing and forming the by-pass. Fastening means 25 may be used to secure housing 24 to the base and side of partition 3' in the compartment 4. A spider bracket 2l is bolted to by-pass housing 24 `over passage 22 to carry drive shaft 28. Propeller 23 is connected to the lower end-*of the drive shaft 28. The drive shaft 28 extends upwardly through a sleeve 29 having a bearing 30 projectingtherein which extends from inner cover I9, the bearing being enlarged at 3| and carrying anti-friction rollers if found desirable. The upper end of drive shaft 28 is furnished with a pulley 32 driven by a belt 33 or like driving connection leading from an electric motor 34. It will be noted, therefore, that the inner cover I 9 acts to carry certain` parts of the drive for the propeller 23, and compactly supports the motor 34 and these parts at the upper end of container I.

It is common practice to incorporate additional smaller coils 31 in the compartment 5 for cooling drinking water. Such coils 31 may be 'located within a sleeve 3.5, as shown, or in any other conto form upper passage 2|.

venient point which will effectively cool the drinking water without freezing the same.

A thermally responsive element, such as a thermostat 40, is disposed in compartment 5 in intimate contact with the inlet connections II and I2 of the beverage coils 9 and I0 by means of brackets 4I. Thermostat 40 is arranged in the electrical circuit of motor 34 at 43 and is adapted to close this circuit to start the motor when the temperature of the inlet connections I I and I2 or the beverage entering the same drops below its predetermined temperature setting. A temperature setting device 42 may be located at any convenient point with respect to container I so that it may be accessible to vary the temperature setting of thermostat 40 if desirable.

Container I may assume different forms and shapes, this being illustrated in Figs. 4 and 5, by the provision of separate tanks 45 and 46 having aconnecting member 4'I at the upper inner edges The inner walls 48 and 49 of tanks 45 and 46, which inner walls 48 and 49 form, in effect, partition 3, of the form of device shown in Figs. l and 2, are spaced apart slightly to provide an air space 50. While I desire to provide air space 5U between tanks 45 and 46 as a practical matter, it will be understood that this is not necessary and that a single tank with a heat insulated partition therein, as illustrated in the aforesaid embodiment, may be used instead.

In the event separate tanks A45 and 46 are employed, a base 5I may be furnished with a by-pass 52 between these tanks at their lower ends. Base 5I may have shoulders 53 formed thereon for the purpose of receiving tanks 45 and 46 in suitable fastening relation. A perforated bracket 54 may be disposed over an extension 58 and bolted to base 5I within and at the lower end of tank 45. Bracket 54 serves to support propeller 23 and its drive, including drive shaft- 28. This construction is substantially the same as shown and described in Figs. 1 and 2. The opposite end of bypassl 52 opens into the bottom of container 46. Base 5I at this end of by-pass 52 is also adapted to have an extension 55 acting as a mouth to direct the cooling medium coming from 'the refrigerant compartment directlyinto the interior of the beverage coils and thereby to bring it into intimate contact as soon as possible with the inlet connections II and I2 of beer coils 9 and IU.

In both embodiments of the invention, it is desirable to provide a baille or damper for passage 22, which will drop by gravity into closed position when the cooling medium is not circulating. Such baille or damper is illustrated at 55 in Fig. 2 and at 56 in Fig. 5. The purpose of the baffles is to prevent a thermal circulation from one compartment to the other through either of the passages 2I and 22, when the propeller 23 is at rest and the cooling medium is not circulating, as the result of the difference in temperature of lthe cooling medium in thesejcompartments.

When the propeller 23 is at rest, the level of the cooling medium in these compartments is preferably slightly below the upper passage 2I. If bailles 55 and 56 were not provided fori the lower passage, a lowering temperature in compartment 4 would lower the temperature of compartment 5 through passage 22 and tend to freeze the beverage in coils!) and I0. If a thermal circulation of the cooling medium did occur, it would continue independent of the control of the thermostat 40 and might lower the temperature in the compartment 5 to a point which would the coils, but is so slight as to beverage coils 9 and of the source of refrigeration,

a temperature of yit may be located in beer in the coils 9 and I0 as the result such as the compressor 26, continuing to operate and lower the temperature of the refrigerant in coil 5 below that which is intended or might be desirable.

In operation, the compressor 26 will operate intermittently` to maintain the temperature `of the refrigerant, and of course, the refrigerant coil 6, at a predetermined low temperature, say for example, at a low maintain the cooling medium in compartment 4 at 32 Fahr. With the cooling medium held at say 32 Fahr., the temperature of the beverage when first withdrawn, as from spigot Il, will be approximately 38 Fahr. Thermostat 40 may operate to close the motor freeze the circuit at say a temperature of 36 Fahr., and

cause the propeller 23 to circulate the cooling medium from compartment 4 into compartment 5. Due to the rate at which the beverage is drawn through the coils 9 and l0, when there is a constant demand for the beverage at spigot I1, the temperature ofthe beverage will rise several degrees, say to about 40 Fahr., and be maintained at such temperature irrespective' of further continued demand at the spigot. This difference of temperature, as stated, will occur as a result of the time required for the heat transfer through be unnoticeable by the consumer. The apparatus will, however, maintain the beer at 40 Fahr. temperature due to the fact that when there is a further continued demand for the beverage at the spigot, the propeller 23 will continue circulating the cooling medium from the refrigerant chamber 4 to the beverage coil chamber 5, and this circulation being maintained at a constant rate will hold the beverage in coils 9 and IU at this desirable low temperature and will effect a relatively rapid transfer of heat from the beverage coils 9 and I0 to the ycooling medium. l

It will thus be apparent that the higher ternperature beverage entering the coils 9 and l0 at their inlet connections Il and l2 will, if it continues to be drawn through the coils as a result of a demand for the beverage at the spigots, promptly influence the thermostat 40 and cause the motor to drive propeller 23. The cooling medium entering compartment 5 through by-pass 22 from compartment 4 will act to maintain the l at a constant or predetermined low temperature. Due to the eicient circulation of the cooling medium through these compartments and the promptness with which it will respond when the beverage first enters the coils 9 and l0 at their inlet connections, the beverage will be properly cooled before leaving the spigots irrespective of the continued demand at any one time.

AWhile the positioning of thermostat 40 in close proximity to inlet connections Il and I2 of the coils 9 and to the temperature of the incoming beverage, it will be understood that this thermostat may be located in either inlet Il or I2, suchA as I have shown in connection with inlet Il in Fig. '1, or the compartment to be responsive to the cooling medium.

It will be apparent to those skilled in the art that various modifications and arrangements of the parts may be made without departing-from the scope of the invention.

I claim:

l. In a refrigerating apparatusthe combina` tion of two compartments, cover means for said temperature, which will` IOWBI paSSage ment through said lower passage,

I0 is suiiicient for it Vto be responsiverefrigerant coil in one of said compartments, a beverage coil in the other compartment, inlet and'outlet connections forsaid coils carried by said cover means, said coils being attached to'said inlet and outlet connections so as to be removably held in said compartments by said cover means, means for circulating a cooling medium from one to the otherv compartment, and means responsive to the temperature of the beverage at the inlet of said beverage coil for starting and stopping said circulating means.

2. In a refrigerating apparatus, a refrigerant compartment and a beverage compartment, a refrigerant coil anda beverage coil in said respeccompartments, a

,tive compartments, a passage between said compartments substantially at their upper end, a

tially at their lower end, a moto-r driven propeller for circulating a cooling medium from said refrigerant compartment through said beverage compartment, and means fo-r positioning said motor driven propeller adjacent said lower passage, said means being provided with a passage coextensive with said lower passage through which said propeller forces the cooling medium bodily over said beverage coil.

3. A beverage refrigerating unit, comprising, in combination, ant coil in one compartment, `a beverage coil in the other compartment, said compartments hav= ing communicating passages substantially at or near their upper and lower ends and having a cooling medium circulating from the refrigerant coil compartment through the lower passage upwardly and out of the beverage coil compartment through the upper passage back into the refrigerant coil compartment, fand a motor driven propeller providing saidcirculation, said propeller being to provide a forced circulating stream which enters said beverage coil compartsaid` lower passage directing the forced circulating stream substantially centrally upward through said beverage coil compartment whereby to effect a continuous agitated flow surging upwardly over said beverage coil, the cooling medium entering said beverage coil compartment bodily moving the cooling medium therein in an upward direction to compel continuous displacement thereof over said beverage coil and back into said refrigerant coil compartment through said upper passage. 4. A beverage refrigerating unit, comprising, in combination, two compartments, a refrigerant coil in one compartment, a beverage coil in the other compartment, said compartmentshaving communicating passages substantially at or .near their upper and lower ends and having a cooling medium circulating from the refrigerant coil compartment through the lower passage upwardly and out of the beverage coil compartment through the upper passage back into the refrigerant coil compartment, a motor driven propeller providing said circulation, said propeller being disposed with respect to said lower passage two compartments, a refrigerdisposed substantially in said' to provide a forced circulating stream which en Y thereto into said ment thereof over said beverage coil and back into said refrigerant coil compartment through said upper passage, and a thermal responsive element actuated by the temperature of the beverage entering said beverage coil for controlling the operation of said motor driven propeller.

5. A beverage refrigerating unit, comprising', in combination, two compartments having communicating passages substantially at or near their upper and lower ends and a cooling medium adapted to be circulated therethrough, a refrigerant coil in one of the compartments, a beverage coil in the other compartment, and a motordriven propeller providing said circulation, said propeller being disposed adjacent one of said passages to provide a forced circulating stream which enters said beverage coil compartment through the last said passage, the last said passage directing the forced circulating stream substantially centrally through said beverage coil compartment whereby to eifect a continuous agitated iiow surging through land over said beverage coil, the cooling medium entering said beverage coil compartment bodily moving the cooling medium therein in a direction to .compel continuous displacement thereof over said beverage coil and back into said refrigerant coil compartment through the other passage. ,Y

6. In a refrigerating apparatus, the combination of a refrigerant compartment and a beverage compartment, a refrigerant coil and a. beverage coil in said compartments, said "compartments having openings at or near their upper and lower. ends, communicating passages connecting said compartments at said openings, one of said communicating passages being connected to said refrigerant compartment at the opening in the lower end thereof, the other communicating passage being connected to said refrigerant compartment at the opening in the upper end thereof. and a motor driven propeller in said refrigerant compartment for circulating a cooling medium from said refrigerant compartment through its lower opening and said passage connecting beverage compartment, said motor driven propeller being located substantially adjacent said lower opening in said refrigerant compartment for forcing a substantial flow of the cooling medium therefrom into said beverage compartment to effect an agitated flow surging through and over said beverage coil in a direction to compel continuous displacement over said beveragecoil.

' 7. In a refrigerating apparatus ofthe class described, two tanksarranged parallel in a sideby-side relation, two coils arranged one in each tank and in the same direction as the tank, inlet and outlet connections for said coils, cover means carrying saidA connections, said coils being attached to said connections so as to be removable with said cover means from said tanks, and' motor driven means including communicating passages between said tanks for establishing a forced circulation of a cooling medium therethrough.

8.- In a refrigerating apparatus of the class described, two tanks having communicataing passages for'the circulation of a cooling medium, a beverage coil longitudinally arranged in one tank, a refrigerant coil longitudinally arranged in the other tank, a motor, a drive from said motor extending lengthwise in said refrigerant coil tank, as propeller at the end of said drive, and cover means carrying said coils and said motor in removable relation upon said tanks.

9. In a refrigerating apparatus of the class described, two tanks having communicating passages providig for the circulation of a cooling medium substantially longitudinally and centrally through said tanks, and a coil in each tank so arranged therein with respect to said longitudinal central circulation that at least a substantial portion of each coil lies in the circulating cooling medium. i

10. In a refrigerating apparatus of the class described, two tanks having communicating passages providing forV the circulation of a cooling medium substantially longitudinally and centrally through said tanks, a coil in each tank so arranged therein with respect to' said longitudinal central circulation that at least a substantial portion of each coil lies in the circulating cooling medium as it is forced through said tanks, inlet and outlet connections for supplying a. refriger-A ant to one of said coils', inlet and outlet connections for supplying a beverage to the other coil, and means providing for a forced circulation of the cooling medium comprising a motor driven propeller disposed in said refrigerant coil tank substantially centrally below said refrigerant coil and above the opening of one of said communieating passages.

ll. Refrigerating apparatus of the class described comprising, in combination,` two tanks connected together by communicating passages adapted to provide for the circulation of a cooling medium between said tanks/cover means for closing onel end of said tanks, -a beverage coil in one tank, a refrigerant coil in the other tank; said cover means removably suspending said coils in said tanks, a propeller disposed in one of said tanks' adapted to establish a forced circulation of the cooling medium through one tank and back to the other tank by means of said communicating passages, a motor mounted on top of` said cover means, and a driving connection extending through said\ cover means and into one of said tanks to connect said motor with said propeller.

12. Refrigerating apparatus of the class described comprising, in combination, two tanks each having one end open, cover means for closing said open ends, a refrigerant coil suspended in one of said tanks from the under side of said cover means, a beverage coil similarly suspended in the other tank, and means for circulating a cooling medium through one tank and back through the other tank, including a motor mounted on top of said cover means, a drive extending through said cover means into said tank containing said refrigerant coil, and a propeller at the end of said drive, said tanks having open-- ings in their bottoms and openings at or near their uppei` ends, and communicating passages connecting between said openings, said bottom openings providing for a substantially complete displacement of the circulating cooling4 medium substantially longitudinally through and centrally out of one tank and into and longitudinally through the other tank.

13. Refrigerant apparatus of the class described comprising, in combination, a pair of tanks having cover means therefor` and communieating passages therebetween, an exteriorly supported motor on saidl cover means, a drive therefrom extending longitudinally into one-of said tanks, a propeller at the end of said drive, a refrigerant coil in said tank, said refrigerant coil cover means in the other tank, said tanks having openings in their upper ends and openings/inf said tanks, a propeller at the end of said drive,`

a beverage coil in one of said tanks, a refrigerant coil in the other tank, and inlet and outlet connections for said coils in said cover means and to which said coils are connected for suspended support from lsaid cover means.

15. Refrigerating apparatus of the class described comprising, in combination, a pair of tanks having communicating passages therebetween, means for circulating a cooling medium through one tank and back through the other tank including a motor and a propeller driven thereby, a refrigerant coil in one tank, a beverage coil in the other tank, and a thermostat in said tank containing said beverage coil for controlling said motor," the inlet end of said beverage coil being in the form of a substantially straight tube extending lengthwise of the coil and disposed interiorly thereof ,to lie substantially parallel to and adjacent said thermostat whereby the incoming beverage ows through said inlet end and past said thermostat before circulating through said beverage coil.

16. 'Refrigerating apparatus of the class described comprising, in combination, a pair of interconnected tanks, means for circulating a cooling medium through one tank and back through the other tank including a motor and a propeller driven thereby, a refrigerant coil in one tank, a beverage coil in the other tank, and a thermostat in said tank containing said beverage coil for coritrolling said motor, the inlet end of said beverage coil being in the form of a substantially straight tube extending lengthwise of the coil to lie substantially parallel to and adjacent said thermostat whereby the incoming beverage flows through said inlet end to influence said thermostat before entering said beverage coil.

17. Refrigerating apparatus of the class described comprising, in combination, a pair of interconnected compartments, means for providing a forced circulation of a cooling medium through one compartment and back through the other compartment, a motor for driving said circulating means, a refrigerant coil in one compartment, a beverage coil in the other compartment, and a thermostat in said compartment containing said beverage coil for controlling said motor, the inlet end of said beverage coil lying adjacent said thermostat whereby said thermostat is influenced by the incoming beverage before it completely flows through said coil, there beingprovisions with respect to said forced circulation of said cooling medium to prevent a thermal circulation' when said motor driven means discontinues said forced circulation.

189Refrigerating apparatus of the class described comprising, in combination, two compartments having communicating passages therebetween, means for circulating a cooling medium through one compartment and back through the other compartment by means of said communicating passages, a motor for driving said circulating means, said communicating passages being so arranged with respect to the ends of said compartments that the cooling medium circulates substantially longitudinally and centrally through each compartment in a streaml of a sectional area substantially equal to the sectional area of each compartment, a refrigerant coil concentrically disposed in one compartment, a beverage coil concentrically disposed in the other compartment, and a thermostat positioned longitudinally within said beverage coil and adjacent the inlet end thereof, the convolutions of said coils being of a diameter allowing the circulating cooling medium to pass centrally through said coils and over their respective convolutions.

19. In a refrigerating apparatus of the class described, two tanks having communicating passages, power operated means for providing a forced circulation of a cooling medium substantially longitudinally and centrally through said tanks by way of said communicating passages, and a coil in each tank so arranged therein with respect to said longitudinal central circulation that at least a substantial portion of each coil lies in the circulating cooling medium, there being provision with respect to said communicating passages for preventing a thermal circulation of said cooling medium when said power operated means discontinues said forced circulation.

20. In a refrigrating apparatus of the class described, two compartments having communicating passages, power operated means for providing a forced circulation of a cooling medium through said compartments by way of said communicating passages, a refrigerant coil in one of each coil lies in the circulating medium, and a thermostat for controlling said power operated means so positioned in said compartment containing said beverage coil as to be responsive to the temperature of the beverage before it travels from end to end through said beverage coil, there being provisions with respect to said communicating passages for preventing a thermal circulation of said cooling medium when said power operated means discontinues said forced circulation.

l21. In a refrigerating apparatus of the class described, two compartments having openings at or near their bottom and openings at or near their top, communicating passages connected to said compartments at said openings providing for a forced circulation of a cooling medium through said compartments, a refrigerant coil in one compartment, a beverage coil in their other compartment, said coils being supported in said compartments substantially over said bottom openings, and amotor driven propeller disposed in one of said tanks substantially over its bottom opening for establishing said forced circulation.

22.111 a refrigerating apparatus of the'class said tanks substantially over its bottom opening for establishing a forced circulation, and a motor for driving said circulating means, said motor and said coils being carried from the top of said compartments.

23. In a refrigerating apparatus of the class described, two compartments having communicating passages providing for the forced circulation of a cooling medium substantially longitudinally through said compartments, a coil in each compartment so arranged with respect to said longitudinal circulation that at least a substantial portion of each coil lies in the circulating medium as it is forced through said compartments, said communicating passages connecting with said compartments substantially at opposite ends thereof to provide for said longitudinal circulation, and a motor driven device for establishing said forced circulation, said device beinglocated substantially adjacent the opening of one of said communicating passages, said opening being of a width suiiicient to substantially receive the moving stream of the cooling medium set up by the operation of said device whereby to effect a substantially complete and continuous displacement of the cooling medium out of one compartment into and through the other compartment.

24. In a refrigerating apparatus of the class described, two compartments having communicating passages, a refrigerant coil in one compartment, a beverage coil in the other compartment, power operated means for providing a 5 forced circulation of a cooling medium between said compartments,said communicating passages being so connected between said compartments as to provide for a'through ow of the cooling medium in each compartment, a thermostat for controlling said power operated means, said thermostat being so positioned with respect to said beverage coil as to be responsive to the temperature of the beverage before it travels from end to end lthrough said beverage coil and so posiy tioned with respect to said through flow of the cooling medium as to be influenced by the temperature of the cooling medium as soon as the cooling medium is circulated out of said refrigerant coil compartment and into said beverage coil compartment, there being provisions with respect to said forced circulation of said cooling medium to prevent a thermal circulation when said power operated meansv discontinues said forced circulation.

MATTHEW PATRICK FUGLE. 

